Antidazzle device



Aug. 27, 1940. wiREX 2,212,793

ANTIDAZ ZLE DEVICE Filed June 5, 1939 Patented Aug. 27, 1940 .5; VENTOFFlCE Walter James Rex, Hatch End, England Application June 5, .1939,Serial No. 277,545 In Great Britain September 13, 1937 2 Claims. (Ci.40-132) This invention seeks toprovide an improved of course arrangedhorizontally. The block of antidazzle device for a lamp, and may be saidlaminations 9 is received within the carrying to consist in anantidazzle device comprising one frame composed of the guides I5 and [6which or more sections of closely-disposecl thin glass are attached tothe casing at the forward ends UNIT 5 or other transparent parallelstrips placed edgeand have their inner, ends turned over, as inwise withrespect to the light source, said strips dicated at H, to serve forretaining the block having at least one surface ground or similarly andsuch other members as may be used theretreated so that direct projectionof light takes with, as will be referred to .later.

place only through the edges of the strips with In addition to the blockof laminations 9,

10 no appreciable reflection off or projection there are illustrated inFigure 2 further transin through the ground surface or surfaces.parencies i8, i9 and 20 which are receivedwith- The invention furthercontemplates placing in the guides and I6 behind the block of behind anantidazzle device such as that imlaminations. The-front transparency mayinmediately-above described certain other transelude written matterappropriately placed there- 15 parencies; for instance it has been foundthat on and may in some cases be ribbed vertically where the laminationsof the previously-proor horizontally to assist in directing the lightacposed glass extend horizontally, the provision cording torequirements. The transparencies l9 behind that glass of a further sheetof glass with and 26 may be variously coloured; for example Verticalribs or laminations tends to spread the the transparency l9 may be redand the translight laterally without any tendency to increase parency 28green, which two colours in com- 20 the spreading upwards or downwards.Again, bination have been found to produce a light certain colouredglasses have the eifect of dimwhich is practically invisible from anypoint ming the light, considerably so as to render it outside the verylimited angle through which practically invisible from any point out ofthe the matter displayed by the sign can be seen.

useful plane of illumination. For illumination of'the matter of thetrans- 5 In the accompanying diagrammatic drawing parency Hi, there isprovided a bulb 2! which forming part of this specification and in whichderives its source of current from a battery Ma like numerals areemployed to designate like in the box It. The bulb conveniently ismounted parts throughout the same: on the horizontal wall 22 whichseparates the Figure 1 is a perspective view of one of the light chamberit from the battery box M. The 30 glass strips used in the antidazzledevice; adapter 23 in which the bulb 2| is carried is Figure 2 is asectional side elevation illustratpreferably supported upon rods 24 sothat it can ing an illuminated sign employing an antidazzle be raised orlowered to get various desired redevice and in addition certain othertranssults.

parencies for purposes which will become ap- There may be provided areflector as indicated 35 parent from the following description; whileat 25 the purpose of which is to reflect light Figure 3 is a sectionalside elevation similar to through the display panel of the sign, and theFigure 4 but illustrating a modified and more reflector may beadjustable; although generally simple form of sign. I speaking it willnot need to be adjusted once ur 4 is a detail plan view better showingit has been erected in the desired position. For 40 the p unt for s pprt n nds of the effecting the initial adjustment, the reflector 25reflector. is located by metal clips 26 and 2? adapted to be Referringnow to the drawing the casing l2 turned up to engage the refl t inposition is dividedinto a hollow top part providing across the topcorner of the casing when it has *5 lamp chamber 13 and a hollow bottompart M for accommodating a battery. The lamp chamber 13 has an openingwhich is closed by a block made up of transparent laminations 9, asshown in Figure 1, preferably having both faces ground f fi mthrtefitence it b as indicated at I I in Figure 1. In addition the eanangemen s m lgure a een ground surfaces are preferably coated withdull devlsed as S1g n Wh1ch Partliularly black paint or adhesive beforebeing placed tos F provldmg an Ffi luumlmf'ted gethen The object of thepresent f m f the sign visible under all conditions of the requiredinvention being to spread the light laterally with- I normal use but pactically invisible outside the out projecting it upwards, thelaminations 9 are required normal field of view. Thus, such an il bothof the clips 26 may extend from a plate which is adjustable along aguide 28, as shown been properly located. For adjustment one or 45 gluminated sign may be particularly useful, for instance, during airraids.

As shown in Figure 2, the arrangement has only a front display panel andon the back of the casing there will generally be provided bands 30 bymeans of which the casing can be attached to a standard or post. Ifthere are four display panels, one on each side wall of a rectangularcasing, the casing will then either be supported on the top of the postor directly upon the ground and arrangements for securing it will thenbe made accordingly.

Although in the Figure 2 arrangement it has been preferred to illustratethe sign as a selfcontained apparatus including a battery, the batterybox may be dispensed with and the bulb 2| then illuminated from someavailable source of current.

The arrangement illustrated in Figure 3 merely serves to show a verymuch more simple form of illuminated sign working on the same principleas that illustrated in Figure 2. The casing 3! in shaped to fit theblock of laminations 9 arranged in the same way as those of the displaypanel in the Figure 2 arrangement, and the back of the casing is curved,as shown at 32, for the reception of a curved reflector 33 secured tothe casing in any convenient manner. The block of laminations is backedby the transparencies l8, l9 and 20 as described with reference toFigure 2. If the display panel should happen to be round when viewedfrom the front, the ribs of the transbehind the laminations thereflection is very considerably deadened. Again, in another case yellowglass may be used behind the laminations and blue glass in front.

What I claim is:

1. An illuminated sign including a casing, a wall dividing the casinginto a, hollow top part and a hollow bottom part, said hollow top parthaving an opening, a reflector carried in the hollow top part on the topand rear walls and opposite the opening, means for adjusting thereflector to difierent angles with respect to the opening, guide memberssurrounding the opening in the hollow top part, transparent stripsmounted in superposed face to face engagement between the guide membersand having corresponding edges presented to the opening, a displayelement behind the strips, an adapter, a light bulb mounted on theadapter, a source of current in the bottom part, and connections betweenthe source of current, the adapter and the light bulb, said bulb beingenergizable by the source of current for projecting beams to bereflected by the reflector to project through the transparent strips forproviding illumination and said adapter being operable for shifting thebulb with respect to the reflector and opening.

2. An illuminated sign including a casing, a wall dividing the casinginto a hollow top part and a hollow bottom part, said hollow top parthaving an opening, supporting means for the casing, said hollow top parthaving a top wall and a rear wall, guides on the inner surfaces of thetop Wall and rear wall, adjustable clips slidably mounted in the guides,one of said clips being mounted on the top wall and the other of saidclips being mounted on the rear wall, a reflector carried in the hollowtop part and extending between the clips, said clips being shiftable foradjustably mounting the reflector in the hollow top part, guide memberssurrounding the opening in the hollow top part, transparent stripsmounted in superposed face to face engagement between the guide membersand having corresponding edges presented to the opening, a displayelement behind the strips, a source of current in the hollow lower part,an adapter mounted on the wall, alight bulb carried by the adapter, andconnections between the current source and the bulb, said bulb beingenergizable by the source of current for projecting beams to bereflected by the reflector to project through the display element andtransparent strips. I

WALTER JAMES REX.

